The seven minute-long propaganda video released on social media shows shockingly young boys wrestling inside the giant ring, as their armed armed commander yells encouragement.

The same fanatical soldier beats them with a stick as they move through an assault course and walks across their aligned stomachs as they lay on the floor. 

Other scenes show the masked boys breaking tiles with their heads, practicing bizarre acrobatic fighting moves and crawling through metal tubes as ISIS fighters fire live rounds over their heads. 

The video, which is thought to show an ISIS base in Iraq, is designed to attract foreign fighters to join the group, the director of Buckingham University's Centre of Security and Intelligence Studies has told the Sunday People. 

Professor Anthony Glees said: Mothers ­elsewhere could be vulnerable, thinking their child could be a failure in Britain – or join IS and become a warrior.' 

'This is sickening ­glorification of the brutalisation of kids for IS. It is designed to appeal to mothers and fathers but children are also the target.' 

ISIS often boasts about these vile training academies on its social media channels, referring to its young recruits as the 'cubs of the caliphate'.

It also shows them off as 'martyrs' when young recruits perish on the battlefield or in sickening suicide attacks which they are brainwashed into believing are a 'great honour'.

ISIS has reprogrammed their young and impressionable minds into those of killers by 'taking over Islamic schools as part of their entire take over of Islamic society,' according to the executive director of the Investigative Project on Terrorism.

Training young jihadists is useful when they are trying to consolidate territory which is constantly under attack, Steve Emerson told MailOnline.

He added: 'Indoctrinating kids with ISIS fanaticism is not only the easiest population to indoctrinate but also produces new generations of ISIS believers and ultimately at some point fighters. This is the way you build a Caliphate.'

'Their goal is to rebuild the Islamic societies they have conquered into a global comprehensive Islamist system that... takes over all aspects of society from garbage collection to teaching at the Madrassats [religious schools].'

(dailymail.co.uk)